Rear Coilovers 64 C-10

[Arekusu]

Ok, so as I sit here getting closer to the day that I come back from the desert, I'm trying to learn about suspension set up. I read the write up and searched the board.

What I'm triyng to figure out is..

Can i mount coilovers to the stock location where my shocks are or is that stupid? Also, if I do buy the mounting bar for coilovers and go that route, can I maintain the 4" drop that I have in the rear already without worrying about bed cleareance? Maybe to to a 5 " drop?

About my build 64 C-10 , TKO 500, looking at a 3.24 rear gear for an estimated 500ft lbs of torque from a 454 bbc. 27-31" tire is what I'm looking at.

I havent worked with adjustable shocks before but I'm asuming with the QA1 StockStars that I can get the 90/10 or different valve rates?

Thanks!

Alex